Knapsack



FIG. 1 is a perspective view of a knapsack showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view;

FIG. 6 is a right side elevational view thereof;

FIG. 7 is a left side elevational view thereof;

FIG. 8 is a perspective view of the component large bag thereof;

FIG. 9 is a front elevational view of the component large bag thereof;

FIG. 10 is a perspective view of the component small bag thereof;

FIG. 11 is a rear elevational view of the component small bag thereof; and,

FIG. 12 is a perspective view of the component small bag thereof, in the state of being used.

The broken lines shown throughout the views are understood to represent stitching.

The claim is directed to the appearance of the knapsack as it appears with the attached waist pouch. The waist pouch is shown separately in FIGS. 8-12 for the purpose of showing aspects of the design that are not apparent from the other views. 

The ornamental design for a knapsack, as shown and described. 